InfiniteDice is so right about the rear carrier bushing. THAT was what was ripped apart on my old 325i. You can replace that if you lower the exhaust a bit and remove the heatshield over the cat.
I was about to reach in with a few extentions and remove it and replace it again.
As for SIMONIZ and the like, just read the ingredients (or Google) for dimethyl silicones. If it has this, keep it away from your car.
REMEMBER: Be safe and have fun is Rule Number 1.
Originally Posted by 411
just letting this furom [*forum] know